Spin crossover in[MnIII(pyrol)3tren]probed by high-pressure and low-temperature x-ray diffraction

Thermo- and piezochromic properties of [Fe(hyptrz)]A2·H2O spin crossover 1D coordination polymer: Towards spin crossover based temperature and pressure sensors

“…Regarding this issue, very few attempts have been noticed to record the (p-T) phase diagram by using various detection techniques such as optical reflectivity [19][20][21][29][30][31], magnetic techniques [15][16][17][18][32][33][34], X-ray and neutron diffraction [35][36][37][38][39]. This lack of data could be explained by the difficulty to obtain small variations in the applied pressure in both loading and unloading processes, at variable temperatures.…”

Pressure-induced two-step spin transition with structural symmetry breaking: X-ray diffraction, magnetic, and Raman studies

“…25 Indeed, the majority of high-pressure investigations involving SCO systems have used spectroscopic techniques or magnetic studies to characterize the effect of applied pressure on the spin transition. 26 Very few studies to date have used diffraction techniques to explore the relationship between structure and properties of SCO materials under pressure, [27][28][29][30] but such investigations are essential to establishing the driving forces behind the pressure-induced spin transition, as well as to thorough investigation of more complex phenomena such as stepped transitions.…”

Piezo‐ and Photo‐Crystallography Applied to Spin‐Crossover Materials

“…Full high-pressure X-ray diffraction structural investigations, including crystal structure determinations, are currently very few and concern five mononuclear Fe(II) 31,41,57,58 and one Mn(III) 59 complexes as well as one dinuclear Fe(II) compound. 60 The comprehensive pioneering work performed on the SCO compounds [Fe(phen) 2 (NCS) 2 ] and [Fe(btz) 2 (NCS) 2 ] showed a reference case of fulfilled expectations of the effects of high pressure on the features of SCO (see above) and proposed the first study of the corresponding structural effects.…”

“…These results were later confirmed and completed by comparison of the low temperature and high pressure structural features of SCO compounds. 57,59 It was then demonstrated that even in the absence of a phase transition, the crystal packing can be modified in different ways during the course of piezo-or thermal-SCO. A recent study of the dinuclear complex [[Fe(bpp)(NCS) 2 ] 2 4,4 -bipy]·2MeOH, provides an example of the structural origin of the difference between the thermal-and piezo-SCO features.…”